Combination protractor and compass



March 16 1926. 1 1,576,800

H. TlBoNY COHBINATION PROTRAGTORy AND COMPASS Filed Nov. 2l. 1923INVENTOR MMA r a ATroRNEY Patented Mar. 16, 1926.

PATENT OFFICE.

HENRY TIBONY, 0F NEW YORK. N. Y. Y

COMBINATION PROTRACTOR AND COMPASS.

Application led November 21, 1923. Serial No. 676,078;

To all whom t may concer/n:

Be it known that I, HENRY I1BoNY, a citizen of the United States,residing at New York city, in the county and State of New York, haveinvented a new and useful Improvement in a Combination Protractor andCompass, of' which the following is a specifcation.

This invention relates to improvements in a combination protractor andcompass, intended for the use of' workers in w-ood or steel, and has forits special object the providing of an instrument which can beaccurately and quickly adjusted to any angle or circle desired, and alsoused in all kinds of shop and drafting work. As is obvious theconstruction is simple and econoniical and simple to handle witheiciency. Y

These objects are attained by the device shown in the drawings herewithin which z- Fig. 1 is a plan view of my device.

Fig. 2- is a longitudinal sectional view with part of the blade inelevation.

Fig. 3 is an edge view looking from the f top oi Fig. 1.

As shown in the drawings my device consists of a plate 5b, with arectangular fiange 6b slightly cut away at 15 to provide clearance forthe thumb screw 7b by which the blade 8b is pivotally connected to thesaid plate. The end of the blade 8", which rests upon the plate 5b istapered ofi' to form afingerlike member adapted to indicate upon thegraduated scale of the plate the precise angle at which the blade isdisposed toward the plate.

The blade is alsol provided with a longitudinal slot 13 which terminatesat its outer end in an enlarged aperture, through which the sli'dableindex member 14 may be introduced so that it may travel along the saidslot. This member 14 also contains an aperture through which a pencilpoint or other marker may be inserted, to serve, if' desired, inconjunction with the lower extremity of the screw 7b, as a convenientpair of dividers. The member 14 is made in two parts, the upper being` aknurled nut and the lower a stud with a flange with an opening throughthe centre through which the index point projects, the upper end of theystud being threaded for engagement with the knurled nut. The saidtapered lowered extremity 11 of the screw 7b could also be utilized toposition the center of acircle of which the circumference could be drawnby the marker inserted through the aperture in the slidableA indexmember 14.

As shown in Figs. 2 and 3 the thumb nut and the pin may be formedseparately the lower end 11 of the latter being tapered and the upperend being threaded for engagement with the said thumb nut.,

I claim 2- In a universal gauge; a semi-circular plate having asubstantially rectangular fia-nge along the straight edge thereof andthe central portion of the plate being depressed below the upper face ofthe marginal portion;

a blade having a free end, a finger end, a

graduated scale, and a longitudinal slot terminating in an enlargedaperture; an index member slidablyimounted in the said slot` andprovided with an opening adapted to receive marking means; and means forpivotally attaching the said blade to the said plate comprising a pinhaving a tapered lower extremity and a threaded top portion, and athreaded thumb nut adapted to engage with the said top portion of thesaid pin.

HENRY TIBONY.

